Automatic cut-off for oil burners



April 1 1924.

C. C. LILLIBRIDGE AUTOMATIC cu'r OFF FOR 01L BURNERS Filed Dec. 20, 1922 m m m I C. C, Lil/br/dye,

Patented Apr. 1, 1924.

PATENT OFFICE- CURTIS c. LILLIBRIDGE, or noronrnson, KANSAS.

AUTOMATIC GUT-OFF FOR OIL BURNERS.

Application filed December 20, 1922. Serial No. 608,115.

T 0 all whom it may concern.

Be it known that I, CURTIS C. LILLI- BRIDGE, a citizen of the United States, and a resident of the city of Hutchinson, in the county of Reno and State of Kansas, have invented certain new and useful Improvements in Automatic Cut-Offs for Oil Burners; and I do declare thefollowing to be a clear, exact, and complete description there of, such as will enable persons skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawing as showing a construetion in which my invention has been embodied.

The invention relates to an improvement upon the construction shown in my prior Patent No. 1,243,194, granted Oct. 16,1917, and involves a means whereby the automatic cut-off disclosed in the said patent may be exactly and more easily adjusted to interrupt the flow of oil, in the event that there occurs an overflow due to imperfect or incomplete combustion, or to a failure of combustion due to extinguishment of the flame. In either of such exigencies, the flow of liquid fuel is arrested automatically, and flooding with its consequent waste is prevented.

The invention also resides in an improved construction of counterbalancing and valve closing devices in which a plurality of shift able weights carried by the tubular bar are used, so that as the valve closing devices are actuated upon the accumulation in the balanced receptacle of a given mass of liquiol fuel, the counterbalancing weights are shifted from one end of the bar to the other, and by their impact effectively seat the valve in the closing position to which it has been moved by the gravity actuated mass of liquid collected in the balanced receptacle.

The structural features of the devices will now be described in detail, and the novelty thereof pointed out in the appended claims.

In the accompanying drawing:

Figure 1 shows in elevation a 'portion'of the front of a heating furnace and the manner of the attachment of the device constituting my invention thereto.

" Fig. 2 is a view in elevation, looking to the right in Fig. 1, showing the valve coupled into the fuel feed line, and showing the clamp by means of which precise adjustment of the connection of the wheel on the valve stem and the tubular bar is effected, some of the parts being shown in sect1on.

Fig. 3 is an inside view of one of the clamps, and i Fig. 4 is a longitudinal sectional View of the tubular bar showing the shifting weights supported thereby.

Referring to the drawing, the numeral 10 designates a heating furnace of ordinary construction, only part thereof being shown, in the firebox of which is placed a suitable liquid fuel burner 11. Such a burner may be one of the type shown in my prior Patent No. 1,391,641, September 20, 1921, and will permit the fuel to be supplied to the burner through the pipe 12, branching from the main 13. A valve 14, conveniently arranged at the juncture of the pipes 12 and 13, controls the normal flow of the fuel from the reservoir (not shown) to the burner,

and a dial 15 may indicate, upon setting the valve, the amount of such flow, so that a predetermined regulation thereof may be made.

A quick-action valve 16 is coupled into the main 13. The stem 1'? of the valve 16 is provided with a hand wheel 18, of usual contour. Clamped upon the hand wheel is the tubular bar 19, into the ends of which are secured cast plugs 20 and 21, the latter being notched upon their peripheries, into which notches a portion of the 'material forming the tube is compressed to permanently join the parts, as at 22. Extending from the plug 21, is an arm 23, provided at its free end with a hook 24, which latter supports the over-flow receptacle 25.

A pair of clamping members 26 and 27 concavednear their mid-length to embrace opposite sides of the tubular bar 19, and having hooks 28, at one end, to take inside of the rim of the hand wheel 18, at opposite points thereon, so as to engage the wheel with a radial pressure, are brought together by a screw 29, coupling their other ends. The tubular bar 19 is longitudinally adjustable between the clamping members 26 and 27, so that the state of balance of the receptacle 25 with relation to the movable weights 30 and 31, contained in the tubular member 19, may be delicately dcteriinined, so that a slight accumulation of oil in the receptacle will overbalance the weights, and in the downward movement of the receptacle, will rock the tubular member upon its axis, formed by the stem of the valve 16, and shift the weights from one side of the said axis to the other; Thus the valve will be actuated to cut off the fuel supply, when a very slight overflow has taken place.

. By reason of its first passing over the axis about which the tubular member 19 rotates, the weight 30 will be seated against the plug 21, as the container descends. This action is closely followed by the shifting movement of the weight 31, which strikes the weight 30 with a pronounced impact, and augments the forces which operate the valve 16 into closing position. 7

The extent of the opening of the valve 16, to permit a proper flow of fuel, having been determined, the tubular member 19 will be clamped thereto, by the means de scribed. The manner of the engagement of the hooks 28 with the rim of the hand wheel 18, permits the exact rotary adjustment desired, so that the devices will be instantly responsive to efiect interruption of the flow of fuel when occasion therefor arises. In my patent of 1917, before referred to, such exact rotary adjustment could not be attained by reason of the nature of the clamping means employed, but with my present invention the desired e1:- act rotary and longitudinal adjustment of the oil feed control devices is possible, wit-h the result that an entirely satisfactory op eration of the mechanism is achieved.

Having thus described my invention, what I claim and desire to secure by Letters Patent of. the United States, is:

1. In an automatic cutoff for liquid fuel burners, a supply pipe, a quick acting valve therein, a balancing bar connected with the valve stem, a receptacle supported on the bar and actuated by an accumulation of excess fuel to close the valve, and means for adjusting the connection between the balancing bar and the valve stem at any point around the latter.

2. In an automatic cut-off for liquid fuel burners, a supply pipe, a quick-acting Valve therein, a balancingbar connected with the hand wheel of the valve, a receptacle supported at one end of the bar and actuated by an accumulation of excess fuel to close the valve, and means engaging the hand wheel and the balancing bar to permit rotary adjustment of the latter upon the hand wheel at any point.

3.111 an automatic cut-off for fuel oil burners, a supply pipe, 2. quick-acting valve therein including a hand wheel, a balancin bar longitudinally adjustable on the hand wheel, a receptacle supported on one end of the bar and actuated by an accumulation of excess fuel to close the valve, and a clamp engaging the hand wheel and the balancing bar with a radial pressure, whereby the length of the bar may be adjusted transversely of the hand wheel and rotatably about the latter at any point.

a; in an automatic cut-off for fuel oil burners, a supply pipe, a quick-acting valve therein including a hand wheel with a rim, a balancing bar supported upon the hand wheel, a receptacle supported on one end of the bar and actuated by an accumulation of excess fuel to close the valve, and a clamp engaging the rim of the hand wheel at opaosite ioints and embracin the balancin bar, whereby the latter may be adjusted longitudinally upon the hand wheel and rotatably at any point with respect thereto.

5. 111 an automatic cut-off for fuel oil burners, a supply pipe, a quick-acting valve therein including a hand wheel provided with a rim, a balancing bar supported upon the hand wheel, a. *eceptacle supported on one end of the bar and actuated by an accumulation of excess fuel to close the valve, and a pair of clamping members em bracing the said bar and engaging the rim of the hand wheel at opposite points with a radial pressure, whereby the balancing bar may be rotatably adjusted upon the hand wheel at any point with respect thereto.

6. In an automatic cut-off for liquid fuel burners, supply pipe, a quick-acting valve therein provided with a stem, a tubular balancing bar connected with the valve stem and carrying at one end a receptacle by means of which the valve is closed by the accumulation of excess fuel in the receptacle, two balls normally positioned at the opposite end of the tubular balancing bar but shiftaole in the movement of the receptacle to close the valve, and means for rotatably adjusting the bar with respect to the stem of the valve.

7. In an automatic cut-off for liquid fuel burners, a supply pipe, a quick-acting valve therein provided with a stem, abalancing bar connected with the valve stem and supporting at one end a receptacle by means of which the valve is closed by the accumulation of an excess of fuel in the receptacle, a plurality of weights normally positioned at the opposite end of the balancing bar and shiftable in the movement of the receptacle to close the valve, and means for longitudinally and rotatably adjusting the bar with relation to the stem. of the valve.

8. In an automatic cut-off for liquid fuel burners, a supply pipe, a quick-acting valve therein provided with a stem, a tubular balancing bar connected to the valve stem and supporting at one end a receptacle by means of which the valve is: closed by the accumulation of an excess of fuel in the re- In testimony whereof, I have signed in ceptacle, a pair of balls normally positioned name at Hutchinson, Kansas,'this 16th day 10 in the other end of the tubular bar but free of December, 1922.

to shift in the movement of the receptacle to accentuate by impact such closing move- LILLIBRIDGE' ment of the valve, and means for rotatably Witnesses: adjusting the bar with relation to the valve WV. F. WOOLARD, stem at the exact point desired. A. G. PoLAoBEoLY. 

